YLXH Enterprises first was first established in 1988, which owns a sales company named Shanghai YULONG VACUUM PUMP Co., Ltd, two pump factories named GUANGDE YULONG PUMP Co., Ltd & ZHEJIANG XINHUAN VACUUM PUMP Co., Ltd(Formerly named ZHEJIANG YUHUAN VACUUM PUMP FACTORY)and a motor company named Shanghai YULONG XINHUAN MOTOR MANUFACTURER Co., Ltd, was the member of China VACUUM EQUIPMENT PROFESSIONAL ASSOCIATION and also one of the oldest and experienced pump manufacturer in China.